The K31 trigger is criminally underrated—and it's not even close

You're not wrong about the trigger. I've run enough K31s to know that break is something special—that two-stage is honest work, and it doesn't apologize for itself. The straight-pull bolt is also genuinely faster than people give it credit for, and the rifle handles like it weighs four pounds less than it does.

Here's where I live with it, though: ammo. GP11 is drying up faster than it should, and when it's available, you're paying north of $1.50 a round if you're buying small. That math works fine if you're shooting fifty rounds a year and dry-firing the rest of the time. But if you actually *use* one of these rifles the way a rifle should be used—if you're hunting, or running a training day, or just putting lead downrange on a regular schedule—you're either handloading 7.5×55 or you're pinching pennies hard.

I don't disagree that the K31 trigger beats most surplus bolt guns out of the box. It does. But the cartridge is the real conversation, and you're sidestepping it a little. The trigger feel doesn't matter if you can't feed the thing consistently, and right now that's the constraint. A guy with a .308 or even a .303 British is going to shoot more and shoot cheaper, and that means his fundamentals stay sharper.

Keep the K31 for what it is—a beautiful piece of engineering that rewards patience. Just know that patience also costs you at the ammo counter.

Before we move past the trigger, let me ask: how many of those eight are you actually cycling regularly? Because there's something in the straight-pull mechanism that matters here—not the speed of it, but what happens to the bolt carrier timing over a few thousand rounds.

The K31 bolt has what you might call a "borrowed" lockup. The firing pin spring and the bolt carrier spring are working in opposition during the unlock sequence, and that timing—that exact relationship between when the lugs start their rotation and when the carrier starts to retreat—is what makes that trigger feel so clean. But it's also wear-sensitive in a way that, say, a Mauser 98 or a Lee action just isn't.

I've opened up a lot of K31s. Most of them—even the ones that feel good on dry fire—have extractor tension variance or firing pin protrusion creep that the shooter never notices until they're five hundred rounds in and suddenly there's a half-second hangfire or a light primer strike on the seventh round of a string. The trigger didn't change. The mechanism did.

Here's what I'd want to know: on those three you've actually run ammunition through, have you measured the headspace? Checked extractor tension with a scale? Looked at firing pin protrusion under magnification? I'm not saying your rifles are out of spec—K31s were built tight—but that trigger feel is telegraphing something about the whole system, and I'd want to know if what you're calling "predictable" is actually "hasn't worn enough to announce itself yet."

That's the diagnostic part. The mechanism rewards a correct, matching rifle, sure. But correct takes inspection.

My grandfather carried a K31 through the latter part of the war—Swiss service, 1944 production—and when he came home he set it in the corner of the gun cabinet and never touched it again except to oil it once a year. Didn't hunt with it, didn't shoot it. Said it was too fine a thing to wear out, and besides, he'd had enough of wearing things out.

I inherited that rifle when I was twenty-three, and the first thing I wanted to do was cycle it, clean it proper, maybe run a box of ammo through it. My father stopped me cold. He said, "That gun isn't yours to shoot. That gun is yours to keep."

I didn't understand him then. Now I do.

The thing about a K31 in original condition—matching numbers, correct finish, unfired except for proof—is that you're holding something that documents a moment in manufacturing history. Not just mechanical history. When you start pulling the trigger, even in dry fire, you're beginning the process of erasing that document. The extractor tension shop.rat mentions? That's measurable *because* it wears. The firing pin protrusion? It creeps because metal moves under friction. Every round you fire is a small departure from what the arsenal gunsmith signed off on in 1943.

That's not a flaw in the rifle. That's the cost of use.

I'm not saying don't shoot them—plenty of K31s were made, and they're built to be shot. But if you've got eight matching rifles from a tight production window, and you're actually *using* three of them hard enough to notice wear patterns, maybe the conversation isn't whether the trigger is good. Maybe it's whether you're comfortable spending down the provenance on the ones you're running. Because once that original finish is gone, that story doesn't come back.

Okay, so here's the thing about GP11 that nobody really wants to admit: it was never supposed to be common outside Switzerland. The Swiss kept their ammunition ecosystem *tight*—that's not a bug, that's the entire point of a national small-arms program. You design the rifle and the cartridge to work together in a closed system, and you don't export the ammo unless you're forced to.

But that's actually where the sourcing reality gets interesting, because there are three separate threads here and they don't all pull the same direction.

First: GP11 itself. You're right that it's drying up. The last commercial runs from Fiocchi and Prvi Partizan have been spotty, and military-grade Swiss production hasn't moved in... well, since Switzerland stopped needing it. That said, there are still import channels—small ones, but they exist. I've scored GP11 in the last eighteen months from three different suppliers, never paid more than $1.35 a round if I was patient. The guys getting hit at $1.80+ are buying from panic-driven restock lists.

Second: handloading 7.5×55 is not the hardship people make it out to be. Once you've got brass and a scale, the actual round costs you maybe $0.45–$0.60 depending on powder and bullet selection. The Swiss used relatively modest pressures (52,000 CUP spec), so you're not chasing exotic powders. I load mine with surplus WC846 and Hornady 174gr SPBTs.

Third—and this is where hollow_hank and I probably part ways—the *reason* to shoot a K31 isn't to rack up volume. It's to understand what a well-engineered military trigger actually feels like. If you're comparing trigger reward per round fired, yeah, a .308 Winchester is going to win on ammo economics. But you're not really comparing rifles anymore. You're comparing economies.

The K31 *wants* to be shot in small, disciplined strings. That's how it was designed. The trigger telegraphs everything: lockup, bolt timing, firing pin protrusion. Feed it GP11 or quality handloads, shoot it in fifty-round sessions twice a month, clean the cosmoline out of the import marks, and you'll understand why a 1943 arsenal rifle still outperforms modernized conversions.

Sometimes the gun isn't designed for your shooting schedule. Sometimes you have to match your shooting schedule to the gun.